html,body{
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
}
*{
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: Arial, Helvetica, sans-serif;
}
a{
    text-decoration: none;
    color: inherit;
}
ul{
    list-style: none;
    padding: 0;
    margin: 0;
}
img{
    display: block;
    width: 100%;
    height: 100%;
}
input,button{
    border: none;
    outline: none;
    background: none;
}